C#解析JSON数据,实例中使用了Newtonsoft.Json(Json.NET)类库。
创建JSON数据文件(JsonData.txt)
{
"StatusCode":"200",
"StatusMsg":"Success",
"Data":[
{
"UserID":"1",
"UserName":"张三"
},
{
"UserID":"2",
"UserName":"李四"
},
{
"UserID":"3",
"UserName":"王五"
}
]
}
图一:打印结果
1、解析JSON数据
1.1 方法一
//读取Json文件内容
string jsonStr = GetJsonStr(@"JsonData.txt");
//解析Json数据
RequestResult<List<UserInfo>> userResult = JsonConvert.DeserializeObject<RequestResult<List<UserInfo>>>(jsonStr);
//打印结果
Console.WriteLine("状态编码:" + userResult.StatusCode);
Console.WriteLine("状态信息:" + userResult.StatusMsg);
Console.WriteLine("数据结果:");
foreach (UserInfo user in userResult.Data)
{
Console.WriteLine(String.Format("用户ID:{0},用户名称:{1}", user.UserID, user.UserName));
}
1.2 方法二
//读取Json文件内容
string jsonStr = GetJsonStr(@"JsonData.txt");
//解析Json数据
var obj = new { StatusCode = 0, StatusMsg = "", Data = new List<UserInfo>() };
var userResult = JsonConvert.DeserializeAnonymousType(jsonStr, obj);
//打印结果
Console.WriteLine("状态编码:" + userResult.StatusCode);
Console.WriteLine("状态信息:" + userResult.StatusMsg);
Console.WriteLine("数据结果:");
foreach (UserInfo user in userResult.Data)
{
Console.WriteLine(String.Format("用户ID:{0},用户名称:{1}", user.UserID, user.UserName));
}
2、其他代码
2.1 创建请求结果类(RequestResult.cs)
/// <summary>
/// 请求结果类
/// </summary>
public class RequestResult<T>
{
/// <summary>
/// 状态编码
/// </summary>
public int StatusCode { get; set; }
/// <summary>
/// 状态信息
/// </summary>
public string StatusMsg { get; set; }
/// <summary>
/// 数据结果
/// </summary>
public T Data{ get; set; }
}
2.2 创建用户信息类(UserInfo.cs)
/// <summary>
/// 用户信息类
/// </summary>
public class UserInfo
{
/// <summary>
/// 用户ID
/// </summary>
public int UserID { get; set; }
/// <summary>
/// 用户名称
/// </summary>
public string UserName { get; set; }
}
2.3 其它函数
/// <summary>
/// 读取Json文件内容
/// </summary>
public static string GetJsonStr(string fileName)
{
string jsonStr = "";
StreamReader sr = new StreamReader(fileName, Encoding.Default);
string line;
while ((line = sr.ReadLine()) != null)
{
jsonStr += line.ToString();
}
return jsonStr;
}